Global ETD Search

1	Climate change enhances the mobilisation of naturally occurring metals in high altitude environments. Zaharescu, Dragos G, Hooda, Peter S, Burghelea, Carmen I, Polyakov, Viktor, Palanca-Soler, Antonio 01 August 2016 (has links) Manmade climate change has expressed a plethora of complex effects on Earth's biogeochemical compartments. Climate change may also affect the mobilisation of natural metal sources, with potential ecological consequences beyond mountains' geographical limits; however, this question has remained largely unexplored. We investigated this by analysing a number of key climatic factors in relationship with trace metal accumulation in the sediment core of a Pyrenean lake. The sediment metal contents showed increasing accumulation trend over time, and their levels varied in step with recent climate change. The findings further revealed that a rise in the elevation of freezing level, a general increase in the frequency of drier periods, changes in the frequency of winter freezing days and a reducing snow cover since the early 1980s, together are responsible for the observed variability and augmented accumulation of trace metals. Our results provide clear evidence of increased mobilisation of natural metal sources - an overlooked effect of climate change on the environment. With further alterations in climate equilibrium predicted over the ensuing decades, it is likely that mountain catchments in metamorphic areas may become significant sources of trace metals, with potentially harmful consequences for the wider environment. Climate change High altitude Trace elements Lakebed sediment record Weathering and transportation Contaminant risk
2	Analysis of Suspended Sediment Loads in Streams and Rivers using Linear Regression and Pearson Correlation Sakwe, Chantal Wase January 2015 (has links) No description available. Geology Statistics Biology Environmental Science Suspended sediment load Sediment record length Stream flow Linear Regression Analysis Pearson correlation Fecal coliform Nutrients
3	Late Holocene Environmental Variability as Recorded in the Sediment of a Northeastern Ohio Kettle Lake Grochocki, Julian Lucian 27 June 2017 (has links) No description available. Sedimentary Geology Environmental Geology Geology Paleoclimate Science Limnology Geochemistry Environmental Science Holocene Sediment Kettle lake Environmental impacts Trace metal geochemistry Environmental magnetism Climate change Sediment focusing Sediment dispersal Sediment cores Lake bathymetry Watershed pollution Lake sediment record
4	Sediment Dispersal Processes and Anthropogenic Impacts at Rex Lake, Summit County, Ohio Mitchell, Stephanie Bianca 17 September 2015 (has links) No description available. Environmental Geology Geology Geophysics History Sediment Record magnetics history kettle lake anthropogenic trace metals combustion particles flux acoustics remotely sense sediment focusing Ohio Summit County pollution proxy seismic reflection coring pollution environmental regulations

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